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SDL_sysaudio.h
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is SDL_free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#ifndef _SDL_sysaudio_h
#define _SDL_sysaudio_h
#include "SDL_mutex.h"
#include "SDL_thread.h"
/* The SDL audio driver */
typedef struct SDL_AudioDevice SDL_AudioDevice;
#define _THIS SDL_AudioDevice *_this
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typedef struct SDL_AudioDriverImpl
{
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int (*DetectDevices) (int iscapture);
const char *(*GetDeviceName) (int index, int iscapture);
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int (*OpenDevice) (_THIS, const char *devname, int iscapture);
void (*ThreadInit) (_THIS); /* Called by audio thread at start */
void (*WaitDevice) (_THIS);
void (*PlayDevice) (_THIS);
Uint8 *(*GetDeviceBuf) (_THIS);
void (*WaitDone) (_THIS);
void (*CloseDevice) (_THIS);
void (*LockDevice) (_THIS);
void (*UnlockDevice) (_THIS);
void (*Deinitialize) (void);
/* Some flags to push duplicate code into the core and reduce #ifdefs. */
int ProvidesOwnCallbackThread:1;
int SkipMixerLock:1;
int HasCaptureSupport:1;
int OnlyHasDefaultOutputDevice:1;
int OnlyHasDefaultInputDevice:1;
} SDL_AudioDriverImpl;
typedef struct SDL_AudioDriver
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{
/* * * */
/* The name of this audio driver */
const char *name;
/* * * */
/* The description of this audio driver */
const char *desc;
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SDL_AudioDriverImpl impl;
} SDL_AudioDriver;
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/* Define the SDL audio driver structure */
struct SDL_AudioDevice
{
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/* * * */
/* Data common to all devices */
/* The current audio specification (shared with audio thread) */
SDL_AudioSpec spec;
/* An audio conversion block for audio format emulation */
SDL_AudioCVT convert;
/* Current state flags */
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int enabled;
int paused;
int opened;
/* Fake audio buffer for when the audio hardware is busy */
Uint8 *fake_stream;
/* A semaphore for locking the mixing buffers */
SDL_mutex *mixer_lock;
/* A thread to feed the audio device */
SDL_Thread *thread;
Uint32 threadid;
/* * * */
/* Data private to this driver */
struct SDL_PrivateAudioData *hidden;
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};
#undef _THIS
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typedef struct AudioBootStrap
{
const char *name;
const char *desc;
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int (*init) (SDL_AudioDriverImpl * impl);
int demand_only:1; /* 1==request explicitly, or it won't be available. */
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} AudioBootStrap;
#endif /* _SDL_sysaudio_h */
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/* vi: set ts=4 sw=4 expandtab: */